1. Department of Chemistry, Tripura University, West Tripura, India
2. Department of Chemistry, Govt. Degree College, Dharmanagar, North Tripura, India
3. Department of Inorganic and Structural Chemistry, Howard University, Washington, DC, USA
4. Department of Botany, R.K. Mahavidyalaya, Unakoti, India
5. Department of Chemistry, Ramthakur College, Agartala, India